CSP-201509-1-数列分段

解题代码

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int n;

int main() {    
    cin >> n;
    vector<int>arr(n);
    for(auto & it:arr) {
        cin >> it;
    }
    auto last = unique(arr.begin(), arr.end());
    arr.erase(last, arr.end());
    cout << arr.size();
    return 0;
}